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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2015, 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "Element.h"
#include <wtf/FixedVector.h>
#include <wtf/TZoneMalloc.h>
namespace WebCore {
class DOMTokenList final {
WTF_MAKE_TZONE_ALLOCATED(DOMTokenList);
public:
using IsSupportedTokenFunction = Function<bool(Document&, StringView)>;
DOMTokenList(Element&, const QualifiedName& attributeName, IsSupportedTokenFunction&& isSupportedToken = { });
inline void associatedAttributeValueChanged();
void ref() { m_element->ref(); }
void deref() { m_element->deref(); }
unsigned length() const;
bool isSupportedPropertyIndex(unsigned index) const { return index < length(); }
const AtomString& item(unsigned index) const;
WEBCORE_EXPORT bool contains(const AtomString&) const;
ExceptionOr<void> add(const FixedVector<AtomString>&);
ExceptionOr<void> add(const AtomString&);
ExceptionOr<void> remove(const FixedVector<AtomString>&);
ExceptionOr<void> remove(const AtomString&);
WEBCORE_EXPORT ExceptionOr<bool> toggle(const AtomString&, std::optional<bool> force);
ExceptionOr<bool> replace(const AtomString& token, const AtomString& newToken);
ExceptionOr<bool> supports(StringView token);
Element& element() const { return m_element.get(); }
Ref<Element> protectedElement() const { return m_element.get(); }
WEBCORE_EXPORT void setValue(const AtomString&);
WEBCORE_EXPORT const AtomString& value() const;
private:
void updateTokensFromAttributeValue(const AtomString&);
void updateAssociatedAttributeFromTokens();
WEBCORE_EXPORT Vector<AtomString, 1>& tokens();
const Vector<AtomString, 1>& tokens() const { return const_cast<DOMTokenList&>(*this).tokens(); }
static ExceptionOr<void> validateToken(StringView);
static ExceptionOr<void> validateTokens(std::span<const AtomString> tokens);
ExceptionOr<void> addInternal(std::span<const AtomString> tokens);
ExceptionOr<void> removeInternal(std::span<const AtomString> tokens);
CheckedRef<Element> m_element;
const WebCore::QualifiedName& m_attributeName;
bool m_inUpdateAssociatedAttributeFromTokens { false };
bool m_tokensNeedUpdating { true };
Vector<AtomString, 1> m_tokens;
IsSupportedTokenFunction m_isSupportedToken;
};
inline unsigned DOMTokenList::length() const
{
return tokens().size();
}
inline const AtomString& DOMTokenList::item(unsigned index) const
{
auto& tokens = this->tokens();
return index < tokens.size() ? tokens[index] : nullAtom();
}
inline void DOMTokenList::associatedAttributeValueChanged()
{
// Do not reset the DOMTokenList value if the attribute value was changed by us.
if (m_inUpdateAssociatedAttributeFromTokens)
return;
m_tokensNeedUpdating = true;
}
} // namespace WebCore
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